# Fathom vs Psychology Dictionary Lab

The clearest difference is in-app purchases: Psychology Dictionary Lab at none against Fathom's 8. Psychology Dictionary Lab also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Fathom sells 8 in-app purchases, starting at $6.99 per month. Psychology Dictionary Lab asks for nothing beyond the download.

Fathom ships an update weekly, Psychology Dictionary Lab fortnightly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fathom | Psychology Dictionary Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (508 ratings)](https://appshunter.io/ios/app/fathom-learn-philosophy/id6742149252/reviews)** | — |
| Number of ratings | **508** | — |
| Positive reviews | 69.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Subscription | — |
| Size | 191 MB | 44 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Polywise, Inc.](https://appshunter.io/developer/1437286958) | [MiDocYa](https://appshunter.io/developer/1665512784) |

## What reviewers say

### Fathom

[App page](https://appshunter.io/ios/app/fathom-learn-philosophy/id6742149252)

Explore great thinkers and philosophies with bite-sized lessons. Understand complex ideas with elegant visuals and build a daily habit of learning. Access over 50 learning paths on diverse philosophical topics.

**Highlights:** Daily philosophy habit building, Bite-sized lessons (under 2 minutes), Elegant visual explanations, 50+ learning paths, Save and review insights, Set learning goals

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $6.99 | per month |
| Premium Monthly Subscription | $12.99 | per month |
| Yearly Subscription (no trial) | $49.99 | per year |
| Yearly Subscription | $49.99 | per year |
| Yearly Subscription (Premium) | $59.99 | per year |
| Yearly Access Premium No Trial | $59.99 | per year |
| Yearly Sub Premium No Trial | $69.99 | per year |
| Yearly Subscription Premium | $69.99 | per year |

**What reviewers like**

- 👍 Engaging and interactive lessons
- 🎨 Visually appealing and informative
- 🧠 Helps develop critical thinking skills
- 🔍 Broad range of philosophical topics covered

**What reviewers complain about**

- 💰 Subscription-based model with limited free trial
- 🤔 Some questions felt leading rather than open-ended
- 🕰️ Lack of flexibility to revisit initial philosopher selections

**Reported bugs**

- Unexpected charges during free trial period
- Potential issues with app functionality and compatibility

**Requested features**

- Option to customize or revisit philosopher selections
- More information about the app's algorithm and learning progression
- Ability to explore a wider range of philosophical perspectives


### Psychology Dictionary Lab

[App page](https://appshunter.io/ios/app/psychology-dictionary-lab/id6771453318)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Fathom free?

Fathom is free to download, with in-app purchases available.

### Is Psychology Dictionary Lab free?

Psychology Dictionary Lab is free to download, with no in-app purchases.

### Do Fathom or Psychology Dictionary Lab have ads?

Fathom shows ads; Psychology Dictionary Lab does not.

### Which is updated more often, Fathom or Psychology Dictionary Lab?

Fathom ships an update weekly, and Psychology Dictionary Lab fortnightly. Most recently, Fathom was updated on October 30, 2026 and Psychology Dictionary Lab on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*